Whistle



FIG. 1 is a top right side perspective view of the present design a whistle.

FIG. 2 is a top plan view of the whistle shown in FIG. 1.

FIG. 3 is a bottom plan view of the whistle shown in FIG. 1.

FIG. 4 is a rear plan view of the whistle shown in FIG. 1.

FIG. 5 is a bottom left side perspective view of the whistle shown in FIG. 1.

FIG. 6 is a left side plan view of the whistle shown in FIG. 1.

FIG. 7 is a right side plan view of the whistle shown in FIG. 1; and,

FIG. 8 is a front plan view of the whistle shown in FIG. 1. 

CLAIM The ornamental design for a whistle, as shown and described. 